The ecotoxicological and chemical response of five metals (Cd, Cr, Cu, Ni, and Zn) to selective fractionation techniques was assessed using the organism Daphnia magna. The metals Cu and Zn revealed similar toxicity patterns, showing an increased toxicity when lowering the pH, a marked reduction in toxicity after addition of ethylenediaminetetraacetic acid (EDTA). Similar toxicity reductions wer...

The presence of high iron (Fe) content in water consumption is a major factor that causes health and aesthetic problems. Its amount samples can be reduced by combining the aeration filtration methods treatment. method basically involves making direct contact between air water, which usually done adding both together. Subsequently, uses porous media like sand, gravel, activated charcoal to filte...

Materials and Methods Preparation of UDP-X1 and UDP-X3-Twenty litres of fresh human milk was deproteinized by adding 1/4 volume of cold 2 N perchloric acid. The supernatant was neutralized with 2 N KOH and the resulting potassium perchloric acid and solidified lipid fraction were removed by filtration. The filtrate was again acidified with 1/10 volume of N HC1 and passed through a charcoal colu...

Active carbon (surface area, 1250 m/g) was used to study vapor breakthrough behavior of sulphur mustard (2, 2’dichlorodiethyl sulphide). Effect of length of carbon bed on vapor breakthrough time has been examined. Rate constant (k v ) is found to increase while kinetic saturation capacity (W e ) is invariable with increase in airflow rate. Both k v and W e decrease with the increase of temperat...

Arsenic, cadmium and lead levels in tobacco filler and cigarette smoke were determined in a 568-sample worldwide survey. Median tobacco levels for arsenic, cadmium and lead were 237, 769 and 397 ng/g respectively, comparable to those previously reported albeit somewhat lower for lead and cadmium. Median mainstream smoke yields for arsenic, cadmium and lead were <3.75, 18.2, and <12.8 ng/cig. un...

A new metabolite was isolated from the culture filtrate of a deacetylcephalosporin C-producing mutant, derived from Cephalosporium acremonium ATCC 14553, by means of adsorption on activated carbon, column chromatography on DEAE-Sephadex A-25 and gel filtration through a Sephadex G-10 column. The compound was identified as D-5-amino-5-carboxyvaleramido-(5-formyl-4-carboxy-2H, 3H, 6H-tetrahydro-1...

1. Recordings were made of the pattern of breathing during and after smoking a cigarette in 14 smokers and nine non-smokers. 2. The most consistent effect was an increase in tidal volume during smoking which reverted to baseline over 1-2 min. Changes in breath times were smaller and less consistent. Similar effects were observed with intermittent inhalations of charcoal. 3 In four subjects the ...

Polyphosphate (polyp) kinase was prepared from EDTA-lysozyme spheroplasts of a Salmonella minnesota rough mutant. The enzyme, purified about 8o-fold, was free of ATPase and polyp-degrading activity and contained neither nucleic acids nor polyp which might act as primer. Using this enzyme, 32P-labelled polyp was prepared from [?P]ATP. The polyp was identified by the action of degrading enzymes, ...

BACKGROUND Exposure to particulate matter (PM) air pollution especially derived from traffic is associated with increases in cardiorespiratory morbidity and mortality. In this study, we evaluated the ability of novel vehicle cabin air inlet filters to reduce diesel exhaust (DE)-induced symptoms and markers of inflammation in human subjects. METHODS Thirty healthy subjects participated in a ra...

Air filters are crucial components of a building ventilation system that contribute to improving indoor air quality, but they typically associated with relatively high pressure drops. The purpose the study is evaluate effect additives on ultrathin electrospun filters, drop, and particle removal efficiency uniformly charged particles. fibres were under optimised conditions resulted in fast-fabri...